3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
24 #ifndef INCLUDED_GR_COSTAS_LOOP_CC_H
25 #define INCLUDED_GR_COSTAS_LOOP_CC_H
27 #include <gr_sync_block.h>
31 class gr_costas_loop_cc;
32 typedef boost::shared_ptr<gr_costas_loop_cc> gr_costas_loop_cc_sptr;
34 gr_costas_loop_cc_sptr
35 gr_make_costas_loop_cc (float alpha, float beta,
36 float max_freq, float min_freq,
38 ) throw (std::invalid_argument);
42 * \brief Carrier tracking PLL for QPSK
43 * input: complex; output: complex
45 * \p order must be 2 or 4.
47 class gr_costas_loop_cc : public gr_sync_block
49 friend gr_costas_loop_cc_sptr gr_make_costas_loop_cc (float alpha, float beta,
50 float max_freq, float min_freq,
52 ) throw (std::invalid_argument);
54 float d_alpha, d_beta, d_max_freq, d_min_freq, d_phase, d_freq;
57 gr_costas_loop_cc (float alpha, float beta,
58 float max_freq, float min_freq,
60 ) throw (std::invalid_argument);
62 float phase_detector_4(gr_complex sample) const; // for QPSK
63 float phase_detector_2(gr_complex sample) const; // for BPSK
64 float (gr_costas_loop_cc::*d_phase_detector)(gr_complex sample) const;
68 int work (int noutput_items,
69 gr_vector_const_void_star &input_items,
70 gr_vector_void_star &output_items);